Written by the Fiveable Content Team โข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโขWritten by the Fiveable Content Team โข Last updated September 2025
Definition
Mg is the chemical symbol for magnesium, an alkaline earth metal with atomic number 12. It is commonly used in alloys, fireworks, and as a dietary supplement.
Related terms
Alkaline Earth Metals: Group 2 elements on the periodic table that have two valence electrons and relatively low reactivity.